Factual error: The story is set in 1976. "Funkytown" is used in the movie and the end titles. The song was not released until 1980.
Factual error: The opening states the location as Bristol, England. Santa is drinking in a pub on Shirely Street (neither the pub or the street exist in Bristol), then shortly after is shown leaving from the rooftop, on his sleigh, with multiple high rise buildings in the background. Bristol does not have high rise buildings in the main city centre, only a few blocks of flats, which all have flat roof tops, not like those depicted.
Factual error: The pub sign states "whisky" - Irish whiskey is always spelled with an E.
Factual error: In the timelapse footage showing the street outside Bob's Restaurant, the shadows are moving in the wrong direction. In the northern hemisphere, shadows go clockwise. (00:13:46)
Factual error: Robert and Giselle have their belongings shipped to their new home at "18 Honey Bee Trail, Monroeville NY 10960." Monroeville is fictitious but the 10960 ZIP Code belongs to Nyack, New York. (00:00:04)
Factual error: In the flashback where Otto gets on the train with Sonia, you can see the familiar Pennsylvania Railroad red keystone logo on the side of the railcar (or engine). The scene is approximately year 1972 (born 1955 from tombstone; Army physicals were age 17/18), and stated as in Pittsburgh. His ticket was $1.10, implying a short ride. But PRR ended commuter service in Pittsburgh in 1964. Moreover, PRR was merged into NY Central in 1968, so by 1972, the logo would have been Penn Central's green "PC."
Factual error: When Danny and Sarah cut in front of the truck to take another route, there were at least 14-17 bullet holes through the rear window alone. Glass on that year of Mustang was not laminated and the bullets would have struck them. (01:27:35)
Factual error: In one scene, Winifred asks Gilbert who Trask is and Gilbert replies that Trask is the "mayor", to which Winifred just acknowledges. However, the office of mayor was not created in Massachusetts until 1823, which is 130 years after they were hanged, so given the witch's lack of knowledge of the modern day, she would have likely not known what Gilbert meant.
Factual error: When the magician has brought the crocodile home at the beginning of the movie and is trying to get him to sing, the crocodile is shivering because he's cold. The magician wraps him with a scarf and the crocodile warms up and is willing to sing. However, this would not work, as crocodiles are cold-blooded and unable to generate body heat. The crocodile would need a heat lamp or some other source to become warm again.
Factual error: At the end of the film a character is walking through a studio lot in 1952. Through the trees behind him can be seen a section of a poster advertising Jackass Forever (2022).
Factual error: The owl that JP was looking at made a "who who" sound. The owl may appear to be a Snowy Owl (one many people are familiar with), but it is a Barn Owl. Barn owls are not "true" owls and it is the true owls who "give a hoot." Barn owls don't hoot; they make a screeching or squealing sound which can be piercing (and eerie to some people). (00:32:50)
Factual error: Birdie tries to use the tune recognizing app Shazam speaking to the wrong device. When she does that, the TV in the background plays footage from CNN, with the coronavirus epidemic, featuring Dr. Fauci. However, in that particular part of the scene they also show a map of the US that displays the states with no mask mandate. The chart can't be a May 13, 2020 one (supposed date of the scene), since it shows the situation at the end of the year. Several states in white like Washington, Nevada, Oregon adopted it only in the summer. (00:08:20)
Factual error: The Lenox Hotel and The Copley Plaza Hotel are a block away from each other. Griffin did not need to take the horse and buggy and then a bus to get there. They are way too close for that.